c语言百分制成绩转化成等级制 哪里有错

Question

#include <stdio.h>
int main()
{
    int score, degree, No_stu, i = 1;
    printf("please input the No. of class:");
    scanf_s("%d", &No_stu);
    while (i <= No_stu);
    {

        printf("please input score:");
        scanf_s("%d", &score);
    }
    while (score < 0 || score >100)
    {
        printf("score is illegal!\n");
        continue;
    }
    degree = (int)(score / 10);
    switch (degree)
    {
    case 10:
        printf("corresponding degree is A\n");
        break;
    case 9:
        printf("corresponding degree is A\n");
        break;
    case 8:
        printf("corresponding degree is B\n");
        break;
    case 7:
        printf("corresponding degree is C\n");
        break;
    case 6:
        printf("corresponding degree is D\n");
        break;
    default:
        printf("corresponding degree is E\n");
        break;
    }
    i++;
    return 0;
}

将百分制成绩（用score表示）除以10之后再取整，一定得到0到10之间的数。

Answer 1

把代码14到40行代码写到第一个while（）循环里面，另外按照我的理解，你设置的变量i代表的应该是类似学号，所以i++可以去掉